air door meaning in Chinese

风门
空气门
通气门

Development and application of hydraulic automatic air door
液压自动风门的研制与应用
The design of automatic air door in trackless main haulage roadway
无轨运输大巷的自动风门设计
Steel thin - walled and reverse air door
钢质薄壳反向风门技术条件
General spacifications for air door switching motion transducer in mine
矿用风门开闭状态传感器通用技术条件
Development and application of new type air door automatic closing equipment
新型风门自动闭锁装置的研制与应用

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